Quick answer. Check that each rig can turn a rate into a coefficient. Every mass transfer experiment here measures a rate, and a rate only becomes a transferable coefficient if three things are known: the driving force, which means analysing both phases or reading wet and dry bulb temperatures on a dryer; the interfacial area, such as a column's wetted area; and a settled steady state before readings begin. Ask what each rig measures on both phases, not just one. Then order by name, because this listing also holds records copied in from unrelated ranges and shares its MTLE prefix with another category.
The mass transfer equipment in this listing covers six subjects, and these are the records to ask for by name: diffusion - vapour in air, liquid in liquid and solid in air diffusion apparatus; gas-liquid contacting - a wetted wall column and absorption in a wetted wall column; adsorption in a packed bed; drying - a fluidised bed dryer, a rotary dryer and natural and forced draft tray dryers; extraction - solid-liquid extraction of the packed bed type and liquid-liquid extraction in a packed bed; and distillation, including a steam distillation set-up.
And the part we would rather tell you than let you discover. This listing also contains records that are not mass transfer equipment at all - they were copied in from other ranges when the catalogue was imported, and most of them can be recognised by a digit on the end of the name. Among them are a shoe flex tester, which belongs with footwear testing equipment; a Martindale abrasion tester, which belongs with fabric testing equipment; a windmill machine, which belongs with renewable energy trainers; and several friction and toggle joint rigs, which belong with theory of machines. There is also a record named after this category itself. We are cleaning this up. In the meantime, ask for the mass transfer items by name, ignore anything with a trailing digit unless we confirm what it is, and have the product name and specification confirmed on the proforma invoice.
One further code warning: this listing uses the prefix MTLE, and so does momentum transfer lab equipment - both category names end in "Transfer Lab Equipment". MTLE-0001 is a fluidised bed dryer here and a drag coefficient apparatus there.
Every experiment in mass transfer measures a rate, and a rate is only a coefficient if three things are known. This is the test to apply to any rig on this page before buying it, and it is what separates a demonstration from a result.
| What must be known | In practice that means | If it is missing |
|---|---|---|
| The driving force | The concentration or humidity difference between the two phases - which means analysing both streams, or measuring wet and dry bulb temperatures on a dryer | No driving force, no coefficient. On a dryer, without the inlet air humidity you cannot compute the driving force at all, only the time the sample took to dry in that room on that day |
| The interfacial area | The wetted area of a column, the surface of a sample, the external area of the particles in a bed | The result is a rate for that apparatus rather than a transferable coefficient |
| Time, and steady state | A stable temperature and a settled flow before readings begin; and for diffusion, patience, because the measurable change is slow | A reading taken while the rig is still settling is a measurement of the settling |
So when you ask us for a quotation, ask what each rig measures on both phases, not just one.
Four dryers are listed - fluidised bed, rotary, natural draft tray and forced draft tray - and drying is the mass transfer subject a student is most likely to meet at work, in food, pharmaceutical and chemical plants alike. The experiment is the drying curve: moisture content against time, showing the constant-rate period, the critical moisture content and the falling-rate period where the material itself starts to control.
Getting that curve requires one thing that is easy to leave off a specification. The sample has to be weighed repeatedly without stopping the air flow - a dryer where the tray must be removed and carried to a balance gives a drying curve with holes in it, and every interruption changes the conditions. Ask whether the sample can be weighed in situ, by a balance under the tray or a suspended arrangement, and what its resolution is.
Then ask for the air side: air flow rate and how it is measured, inlet air temperature and humidity, by wet and dry bulb thermometers or a hygrometer, and whether the air can be heated to a set temperature and held there. A dryer with controlled air temperature, measured air flow and measured humidity produces a drying curve a student can interpret; one with a fan and a heater produces a curve that cannot be compared with anything, including the same experiment next week in different weather.
The wetted wall column gives a gas-liquid mass transfer coefficient, and it depends entirely on the liquid film being smooth and unbroken over the full wetted length. A column with poor liquid distribution channels, the film breaks, the real area is unknown and the coefficient is wrong - so ask how the liquid is distributed at the top, what the wetted length and diameter are, and how the gas is analysed at inlet and outlet. For absorption work, ask what system the rig is designed for and what reagents the analysis needs.
The diffusion apparatus - vapour in air, liquid in liquid, solid in air - measures a diffusivity, which is a slow measurement of a small change: a falling liquid level in a capillary over hours, or a conductivity rising as salt diffuses. Two things matter: a stable temperature, because diffusivity is temperature-dependent and the experiment runs long enough for a room to warm up; and a readable measurement, so ask how the level or the concentration is read and at what resolution. These are good project experiments and poor two-hour practicals.
The extraction units, solid-liquid and liquid-liquid, teach stage efficiency and the use of an operating line, and they bring solvents into the laboratory. Ask which solvent the exercise assumes, whether it can be imported and stored where you are, how it is recovered, and where the spent extract goes. Many extraction solvents are flammable, so extraction equipment belongs in an extracted position away from heaters and ignition sources, and the laboratory needs the provisions set out in our chemical reaction engineering listing - fume extraction, eyewash, a spill kit and a waste route agreed in writing before delivery.
Adsorption in a packed bed produces a breakthrough curve, which is the design basis for every industrial adsorber. Ask what adsorbent is supplied, how the effluent concentration is measured continuously or sampled, and whether the bed can be regenerated so the experiment can be repeated without buying new adsorbent each time - the regeneration is itself worth a session.
Settle before delivery: electrical supply with earth-leakage protection on every outlet, since water, solvents and heaters share these benches; cooling water supply and drain, with the quantity per run for the distillation units; compressed air where a fluidised bed needs it, clean and dry; fume extraction over anything handling a solvent; and bench space that allows a column to be reached at top and bottom.
And if the steam distillation unit is on your list, settle the steam supply first. A steam generator is normally a registered pressure vessel subject to periodic inspection by a competent authority in the destination country, and that is a matter of arranging registration before commissioning rather than after. Ask us for the vessel certificate, drawings and relief settings with the quotation, and put them to your own authority before the equipment ships.
For each rig: the experiment and what is measured on each phase, with accuracies; for dryers, in-situ weighing and its resolution, air flow measurement, inlet temperature control and humidity measurement; for columns, wetted length and diameter, liquid distribution, and the analysis method at inlet and outlet; for diffusion, how the measurement is read and whether temperature is controlled; for extraction and adsorption, the solvent or adsorbent assumed, quantities per run, recovery, regeneration and the waste route; services required, including steam and its certification; time to a result, since several of these are project-length experiments; consumables and spares with prices; the worksheets supplied; mass, footprint and access; nominal voltage, frequency and plug pattern; and the warranty, commissioning and local service position. For any certification stated here, contact us for the latest copies of the relevant certificates before you tender on it.
Related ranges: momentum transfer lab equipment and the heat transfer lab range for the other two transport subjects, chemical reaction engineering for reactors, columns and unit operations, and process control and instrumentation for control. The full set is listed under mechanical lab equipments. For a quotation, send us your syllabus experiment list - on this page that is especially useful, because it lets us quote the mass transfer equipment and leave out the records that should not be in this category at all.
Six subjects: diffusion (vapour in air, liquid in liquid and solid in air), gas-liquid contacting (a wetted wall column and absorption in a wetted wall column), adsorption in a packed bed, drying (fluidised bed, rotary, and natural and forced draft tray dryers), extraction (solid-liquid and liquid-liquid, packed bed type) and distillation, including a steam distillation set-up. Records such as a shoe flex tester, a Martindale abrasion tester, a windmill machine and several friction and toggle joint rigs were copied in from other ranges and are mostly marked by a trailing digit. Ask for items by name and have each confirmed on the proforma invoice.
The drying curve plots moisture content against time and shows the constant-rate period, the critical moisture content and the falling-rate period. To get it, the sample must be weighed repeatedly without stopping the air flow, so ask whether it can be weighed in situ, by a balance under the tray or a suspended arrangement, and at what resolution; carrying a tray to a balance leaves holes in the curve. On the air side, ask how air flow is measured, how inlet temperature and humidity are read, by wet and dry bulb thermometers or a hygrometer, and whether air temperature can be set and held.
The column gives a gas-liquid mass transfer coefficient, and that depends entirely on the liquid film staying smooth and unbroken over the full wetted length. With poor liquid distribution the liquid channels, the film breaks, the real area becomes unknown and the coefficient is wrong. So ask how the liquid is distributed at the top, what the wetted length and diameter are, and how the gas is analysed at inlet and outlet. For the absorption version, ask which gas-liquid system the rig is designed for and what reagents the analysis needs, and leave bench space to reach the column at top and bottom.
Usually not. The vapour in air, liquid in liquid and solid in air apparatus measure a diffusivity, which is a slow measurement of a small change: a liquid level falling in a capillary over hours, or a conductivity rising as salt diffuses. Two things matter. Temperature must be stable, because diffusivity depends on it and the experiment runs long enough for a room to warm up. And the measurement must be readable, so ask how the level or concentration is read and at what resolution, and whether temperature is controlled. Treat these as good project experiments rather than short practicals.
The solid-liquid and liquid-liquid extraction units teach stage efficiency and the operating line, and they bring solvents into the laboratory. Ask which solvent the exercise assumes, whether it can be imported and stored where you are, how it is recovered and where the spent extract goes. Many extraction solvents are flammable, so site the units away from heaters and ignition sources, with fume extraction, an eyewash, a spill kit and a waste route agreed in writing before delivery. For the packed bed adsorption unit, ask what adsorbent is supplied, how effluent concentration is measured, and whether the bed can be regenerated.
The steam supply, first. A steam generator is normally a registered pressure vessel subject to periodic inspection by a competent authority in the destination country, and registration should be arranged before commissioning rather than after. Ask for the vessel drawings and relief settings with the quotation, contact us for the latest copies of the relevant certificates, and put them to your own authority before the equipment ships. Also settle the other services: earth-leakage protection on every outlet, cooling water supply and drain with the quantity per run for the distillation units, and clean, dry compressed air if a fluidised bed needs it.
Ray Export is a manufacturer and exporter of laboratory, scientific and educational equipment based at Plot No. 449, HSIIDC Industrial Area, Saha, Ambala, Haryana 133104, India. Enquiries: [email protected], +91-9817319615.
Written by Palak Mall, Senior Content Writer. Technically reviewed by Arvind Kumar, Lab Equipment Specialist, 12+ years in laboratory and testing instrumentation. Last updated: 17 October 2026.
Specifications for the mass transfer rigs, including what is measured on each phase, in-situ weighing resolution, wetted length and diameter, the solvent or adsorbent assumed and the services required, are confirmed in writing on the quotation. For the steam generator and other documents, contact us for the latest copies of the relevant certificates. No price is quoted on this page. Listing note: this listing contains records copied in from other ranges, including a shoe flex tester, a Martindale abrasion tester, a windmill machine and several friction and toggle joint rigs, most marked by a trailing digit, plus a record named after the category itself; and the MTLE prefix is shared with momentum transfer lab equipment, where MTLE-0001 is a different product.
The setup is intended to exhibit standards of refining in a Sieve Plate Column.
The segment is made of Stainless Steel material with seven sifter plate. An electrically warmed re-kettle is introduced at the base of the section. The base item is gathered in the tank. The vapors shape the highest point of section are dense in the shell and tube write condenser by coursing cooling water provided by research center overhead tank. The condensate is isolated into reflux and distillate via programmed reflux divider and R/D Ratio can be fluctuated. Reflux is bolstered back to the section and distillate is gotten in a getting tank. The entire section is protected for limiting the warmth misfortune. Instrumentation is improved the situation weight and temp. Estimation wherever is vital
Examinations
To examine the Sieve Plate Distillation Column
Highlights
Stainless Steel tanks and wetted parts
Radiant Painted structure
Easy to work and keep up
Reduced and remain solitary set up
Utilities Required
Water Supply 2 LPM at 5 m head
Deplete
Power Supply: 1Phase, 220 V AC, 6.5 kW
Required Chemicals
Refractrometer for investigation
The setup is intended to show standards of shower extraction and mass move task in a section.
The set up comprises of a glass section, nourish tanks, air controller with weight check, accepting plate and channeling. Rotameter are accommodated stream estimation
Trials
Assurance of general tallness of an exchange unit and general volumetric mass exchange coefficient
Highlights
Stainless Steel tanks and wetted parts
Unique plan for changing stature of interface zone
Consistent task
Wonderful Painted structure
Easy to work and keep up
Smaller and remain solitary set up
Utilities Required
Electric supply Provide 230 +/ - 10 VAC, 50 Hz, single stage electric supply with appropriate earthing. 5A, three stick attachment with switch for Compressor
Chemicals for trial according to your decision
Packed Air supply: Clean, oil and dampness free air, weight 2 Bar.
Water Supply and Drain as required
The setup is intended to show standards of refining in a Packed Column.
The section is made of Stainless Steel material pressed with Borosilicate Glass rasching rings. An electrically warmed re-evaporator is introduced at the base of the segment. The base item is gathered in the tank. The vapors frame the highest point of section are consolidated in the shell and tube compose condenser by coursing cooling water and it is provided by research facility overhead tank.
The condensate is isolated into reflux and distillate via programmed reflux divider and R/D Ratio can be changed. Reflux is bolstered back to the section and distillate is gotten in a getting tank. The total section is protected for limiting the warmth misfortune. Instrumentation is improved the situation weight and temp estimation wherever is vital
Examinations
To examine the Packed Distillation Column
Highlights
Stainless Steel tanks and wetted parts
Wonderful Painted structure
Easy to work and keep up
Minimized and remain solitary set up
Utilities Required
Water Supply 2 LPM at 5 m head
Deplete
Power Supply: 1Phase, 220 V AC, 6.5 kW
Required Chemicals
Refractrometer for examination
The setup is intended to exhibit standards of refining in a Bubble Cap segment.
The segment is made of Stainless Steel with seven plates for mounting the air pocket tops. Each plate is given one air pocket top. An electrically warmed re-heater is introduced at the base of the section. The vapors frame the highest point of segment are consolidated in the shell and tube compose condenser by flowing cooling water provided by research facility overhead tank.
The condensate is isolated into reflux and distillate via programmed reflux divider and R/D Ratio can be changed. Reflux is nourished back to the section and distillate is gotten in a getting tank. The entire section is protected for limiting the warmth misfortune. Instrumentation is improved the situation weight and temp estimation wherever is vital
Investigations
To examine the Bubble Cap Distillation Column
Highlights
Stainless Steel tanks and wetted parts
Heavenly Painted structure
Easy to work and keep up
Reduced and remain solitary set up
Utilities Required
Water Supply 2 LPM at 5 m head
Deplete
Power Supply: 1Phase, 220 V AC, 6.5 kW
Required Chemicals
Refractrometer for investigation
The setup is intended to show standards of extraction and mass move activity in a YORK SCHEIBEL'S section.
The set up comprises of a glass section, bolster tanks, air controller with weight measure, getting tanks and channeling. Rotameter are accommodated stream estimation.
The glass segment is separated into various stages; each stage comprises of a woven wire work (quieting) segment and a mechanical disturbance segment. The instigator speed can be differed by drive. The nearness of then again fomenting and quieting areas yield higher extraction proficiency than traditional pressed segment
Examinations
Assurance of general stature of an exchange unit and general volumetric mass exchange coefficient
Highlights
Stainless Steel tanks and wetted parts
Extraordinary course of action for changing tallness of interface zone
Nonstop activity
Heavenly Painted structure
Easy to work and keep up
Reduced and remain solitary set up
Utilities Required
Electric supply Provide 230 +/ - 10 VAC, 50 Hz, single stage electric supply with legitimate earthing. 5A, three stick attachment with switch for Compressor
Chemicals for trial according to your decision
Packed Air supply: Clean, oil and dampness free air, weight 2 Bar.
Water Supply and Drain as required
The setup is intended to show standards of extraction in a Bonnotto compose extraction section. It comprises of a SS segment, nourish tank with warming game plan, accepting tanks and channeling. Rotameter is accommodated stream estimation.
The segment is isolated into numerous stages; each stage comprises of a plate and a mechanical unsettling area. The roundabout plates are organized one over the other in inverse spiral opening, yield higher extraction productivity than ordinary stuffed segment.
The solids are presented at the best through a container spread over the best plate and pushed to space to tumble to the following plate beneath et cetera to the base of the segment. The dissolvable is presented close to the base of the section and it stream upward counter-at present to the solids. A pump supplies the dissolvable and stream rate is observed by methods for a Rotameter. At the base of section a screw transport game plan is done to evacuate the removed solids driven by methods for an electric engine. Dissolvable encourage tank is kept in a shower fitted with warmer. An advanced temperature controller is utilized to control and measure the temperature of nourish
Investigations
To decide the proficiency of a persistent counter-current Solid-Liquid Extraction
Highlights
Stainless Steel tanks and wetted parts
Sublime Painted structure
Easy to work and keep up
Conservative and remain solitary set up
Utilities Required
Electric supply 1Phase, 220 V AC, 3 kW
Chemicals for trial Solvent: 50ltrs Solid: 30kg according to your decision of framework received according to your decision
Water Supply and Drain as required
Vapor-Liquid Equilibrium Set-up The fundamental information of any refining issue are the harmony between the fluid and vapor periods of the framework subjected to refining. Henceforth is of incredible significance to ponder the vapor-fluid balance. The set-up comprises of refining still with a warming component. An electrical Dimmerstat is associated with warming component for fluctuating warmth input. The vapors shape the highest point of section are dense in the shell and tube compose condenser by flowing cooling water. The condensate is gathered in reflux drum and criticism to segment as reflux. A tank with pump is given to flow icy water to condenser. Stream rates can be managed through control valve fitted. Instrumentation is given to gauge the temperatures at various focuses. EXPERIMENTATION: ØØ To decide the vapor Liquid Equilibrium bend for CCl4 and Toluene or some other blend. UTILITIES REQUIRED : ØØ Water Supply. ØØ Drain. ØØ Electricity Supply : 1 Phase, 220 V AC, 1.5 kW. ØØ Refractrometer for Analysis. ØØ Required Chemicals. Specialized DETAILS : qq Distillation still : 1 Ltrs. Limit, made of Stainless Steel. nsulated by fired fleece. qq Condenser : Concentric Tube compose. qq Heater : Nichrome wire qq Cooling Water Tank : Material Stainless Steel , Capacity 15 Ltrs. Approx. qq Cold Water course : Using FHP Pump. qq Temperature Sensors : RTD PT-100 compose qq Control board including Digital Voltmeter : 0-300 Volt. Dimmerstat : 0-230 V, 2A. Computerized Temp. marker : 0-199.90C RTD PT-100 Type with multi-channel switch With standard make on/off switch, Mains Indicator and so on qq Instruction Manual : An ENGLISH guideline manual will be given along the Apparatus qq The entire set-up is mounted on a powder covered base plate .
Cluster Crystallizer Crystallization is the development of strong particles inside a homogeneous period of immersed fluid. Its wide utilize has a two-overlap premise, a precious stone framed from a tainted arrangement is itself unadulterated and crystallization manages a functional technique for isolating w. This activity includes both warmth and mass exchange. Cooling write upset clump crystallizer set up comprises of an open jacketed blended vessel gave water warming & cooling game plan. The bolster is set up in the crystallizer itself with boiling water and stirrer. The hot immersed arrangement in the crystallizer is then cooled by flow of cooling water and precious stones are framed. EXPERIMENTATION: To contemplate the execution of a Batch Crystallizer. To decide the precious stone yield and the proficiency of crystallizer. UTILITIES REQUIRED : Water Supply. Deplete. Power Supply : 1 Phase, 220 V AC, 1.5 kW. Required Chemicals. Specialized DETAILS : Crystallizer (Jacketed Type): Material Stainless Steel , Cap. 2 Ltrs. with funnel shaped base Stirrer : FHP, Variable Speed. Warmer : Nichrome wire radiator Cooling Water Tank : Material Stainless Steel , Capacity 30 liter fitted with Pump. Stream estimation : Rotameter for cooling water. Pump : FHP. Getting Tank : Material Stainless Steel , Capacity 2 liter with SS strainer Temp. Sensors : RTD PT-100 compose Control board involves :Digital Temp. Pointer : 0-199.90C with multi-channel switch and Standard make on/off switch, Mains Indicator and so on. Direction Manual : An ENGLISH guideline manual will be given along the Apparatus The entire set-up is all around planned and masterminded in a decent quality painted structure .
Highlights Low cost, successful instructing. Real business item, changed. Variable number of cutting edges. Variable cutting edge. Assurance of energy yield and productivity. Requires wellspring of wind. Three year guarantee. Scope of Experiments To decide the electrical power yield and slowing down point for a windmill over a scope of Wind speed Blade Angle Number of Blades To research the impact of cutting edge slow down v. control yield To decide the electrical and mechanical efficiencies of the windmill for an indistinguishable factors from in (1). Depiction The windmill is an adjusted rendition of a little business machine utilized for yachts and nation cabins. It has six plastic aerofoil formed cutting edges mounted in an empty center point which contains an arrangement of lasting magnets and a circled conductive winding. At the point when the plant turns, a rotating voltage is created. Windings are mounted on a circle, which is settled to a pole running in direction. This pole is limited by a phosphor bronze spring, strain checked to gauge torque. An inductive transducer is utilized to gauge rotor speed. From these outcomes the mechanical power can be set up. Electrical power yield is estimated as far as the yield voltage over a variable load. The six cutting edges are mounted in flexible supervisors with the goal that their pitch can be adjusted. Edges can likewise be expelled to evaluate the impact of edge strength. A wellspring of wind is required. This can be given by the Wind Machine. This gear is a piece of a range intended to both show and tentatively affirm essential building standards. Extraordinary care has been given to every thing to give wide trial scope without unduly confounding or bargaining the outline. Each bit of mechanical assembly is independent and smaller. Setting up time is negligible, and all estimations are made with the easiest conceivable instrumentation, so the understudy inclusion is simply with the designing standards being instructed. An entire direction manual is given portraying the device, its application, trial method and regular test outcomes.
Highlights Low-financially savvy educating. Independent. Divider mounted. Variable point of lap. Level, round and vee belts. Assurance of coefficient of rubbing. Confirmation of belt pressure law. Three year guarantee. Scope of Experiments To watch the connection between the strains in the two sides of a belt To survey the contrasts between Vee, rope, and level belts To decide the coefficient of grating between the pulley and belt for the belt areas To explore the impact of edge of lap Description The mechanical assembly comprises of a divider mounted pulley with a stacked belt. The pulley is made of aluminum and has two machined depressions to suit a level Vee belt, and a rope. For a given belt strain and edge of lap, a turning minute can be connected by adding weights to the pulley drive holder. The thought is to decide the torque which noble motivations the pulley to turn, thus to discover the proportion of the belt pressures. This empowers the belt strain condition to be confirmed and the coefficient of grating to be resolved. The point of lap can be effectively changed. This gear is a piece of a range intended to both exhibit and tentatively affirm fundamental designing standards. Extraordinary care has been given to every thing in order to give wide exploratory extension without unduly confusing or bargaining the plan. Each bit of device is independent and conservative. Setting up time is negligible, and all estimations are made with the least complex conceivable instrumentation, so the understudy inclusion is absolutely with the building standards being instructed. An entire direction manual is given depicting the mechanical assembly, its application, exploratory technique and normal test outcomes..
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